Mike,
Of all the DACs that I heard at one time in my system, I found the Chord to be the best to my ears. It was very balanced, very musical, sweet, smooth relaxed, detailed, etc. I thought the Audio Logic (current version) was a close second with the stock tubes. I own a AL 34 with the chip upgrade and NOS tubes. For the price of the DAC used and tubes I am a very happy owner. I never had the chance to compare my AL DAC to the Chord. Since that time, the price of the Chord DAC on the used market has come down so that would be a consideration. I also think Tube Technologies makes a tube version of the Chord DAC but I was never able to get my hands on one. The Metronome is not up to par. I am not able to comment on the other DACs you are asking about. The Chord has a few second lag time when playing music so that takes some time to get used to, turn the transport off and the music still keeps playing. The Chord is also the coolest looking component I have ever had.
Happy Listening.